轨面短波不平顺对高架轨道结构振动影响分析  

Analysis on the Influence of Short-wave Irregularities on the Vibration of Elevated Rail Structure

作　　者：房建[1] 邱海浪 邓远星 雷晓燕[1] 练松良[2] FANG Jian;QIU Hailang;DENG Yuanxing;LEI Xiaoyan;LIAN Songliang(State Key Laboratory of Performance Monitoring and Guarantee of Rail Transit Infrastructure,East China Jiaotong University,Nanchang 330013,China;Key laboratory of Road and Traffic Engineering of the Ministry of Education,Tongi University,Shanghai 201804,China)

机构地区：[1]华东交通大学轨道交通基础设施性能监测与保障国家重点实验室,江西南昌330013 [2]同济大学道路与交通工程教育部重点实验室,上海201804

出　　处：《石家庄铁道大学学报（自然科学版）》2024年第3期62-68,共7页Journal of Shijiazhuang Tiedao University(Natural Science Edition)

基　　金：国家自然科学基金(51668019);江西省教育厅科研项目(GJJ180297);江西省研究生创新专项资金项目(Yc2022-s563)。

摘　　要：针对城市高架轨道进行减振降噪研究设计,需要了解轨面短波不平顺作用下轨道-桥梁系统的动力性能和振动响应的影响规律.用UM和ANSYS软件建立地铁B型车和32m高架简支箱梁模型,结合实测结果进行模型验证,使用实测上海地铁1号线轨面不平顺数据,预处理后输入车辆-轨道模型中计算时域轮轨垂向力.通过APDL语言编写do循环将轮轨力施加到箱梁桥钢轨上模拟车辆行进,计算60、70、80km/h3个速度下高架轨道各个部位振动响应,以轮轨力和箱梁1/2跨中钢轨,桥面板垂向振动加速度从时域、频域角度分析轨面短波不平顺对轨道-桥梁系统振动影响规律.结果表明,轨面短波不平顺作用下会产生波幅比较大的垂向轮轨力,随着行驶速度上升逐渐增大;钢轨加速度随着速度增大,增加幅度逐渐上升;3个速度对应钢轨振动最不利波长分别为2.0833、3.0864、3.5273cm,桥梁振动最不利波长分别为26.4550、30.8642、35.2734cm.To study and design vibration reduction and noise reduction for urban elevated rail,it is necessary to understand the dynamic performance and vibration response of rai-bridge system under the action of short wave irregularities,UlM and ANSY'S software were used to establish the model of metro B and 32 m elevated simple supported box beam,and the measured results were combined for model validation,The measured data of Shanghai Metro Line 1 were used,and the time field wheelrail vertical force was input into the vehicle-track model to calculate the time domain wheel rail vertical force,APDl language were used to write do cycle,the wheel rail force was applied to the box girder bridge rail to simulate vehicle travel,and the vibration response ol various parts of the elevated rail was calculated at the speed of 60,70,80 km/h,In rail force and 1/2 span rail of the box beam,the deck plate vertical vibration acceleration was used to analyzed the impact of the rai surface short wave irregularities on the rail-bridge system vibration from the perspective of time domain and freguency domain,The results show that under the action of short-wave irregularities,a vertica wheel rail force with a relatively large amplitude is generated.The rail acceleration increases gradually with the increase of the speed.The most unfavorable wavelengths corresponding to the rail vibration are 2.0833,3.0864,and 3.5273 cm,respectively,and the most unfavorable wavelengths for bridge vibration are 26.4550,30.8642,and 35.2734 cm,respectively.

关 键 词：地铁车辆 箱梁模型 实测不平顺 结构振动响应 

分 类 号：U216.42[交通运输工程—道路与铁道工程]